JP3028372B2 - Multiple sorting cylindrical screen classifier - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical screen classifier used in the pharmaceutical, food, and chemical industries, and more specifically, a particle size of more than two types. , For example, three types,
The present invention relates to a so-called multiple sorting cylindrical screen classifier that can classify into four types.

2. Description of the Related Art In a conventional cylindrical screen classifier, when a raw material is charged into a raw material charging port, the raw material is given a rotational force by a rotary stirring blade, and is rotated while being rubbed against the inner surface of a net-shaped cylindrical screen. The fine powder is discharged from the fine powder outlet through the mesh, and the coarse powder moves on the inner surface of the cylindrical screen without passing through the mesh, and is discharged from the coarse powder outlet.

Problems to be Solved by the Invention In the conventional cylindrical screen classifier, fine powder and coarse powder are used.
You can only classify the types. Therefore, when classifying into three types or four types, desired classification is performed using two or three classifiers having different sizes of openings of the cylindrical screen.

However, when a plurality of cylindrical screen classifiers are used as described above, equipment costs are increased, and a large installation area is required. In addition, the number of classifying processes is increased by the number of classifiers, so that the working efficiency is reduced.

The present invention has been made in view of the above circumstances, and an object of the present invention is to enable multiple sorting with a single cylindrical screen classifier.

Means for Solving the Problems The present invention provides a cylindrical screen classifier in which a rotary stirring blade is provided on a rotating shaft, and a mesh-like cylindrical screen is loosely fitted to the rotary stirring blade. From the outlet to the outlet side, and the inside of the cylindrical screen is partitioned into a differential classroom with a small aperture and a subclassification chamber with a large aperture by a rotating disk fixed to a rotating shaft, thereby achieving the above object. Is to achieve.

When the rotary shaft is driven to rotate the rotary stirring blade and the raw material is supplied to the inlet side of the cylindrical screen, the raw material is given a rotational force by the rotary stirring blade and rotates while being pressed against the inner surface of the cylindrical screen. . During the rotation, the fine powder in the raw material falls to the fine powder outlet through a fine mesh on the inlet side of the cylindrical screen, and the other raw materials head toward the outlet side of the cylindrical screen. On the way, the fine powder larger than the fine powder and smaller than the coarse powder falls to the fine powder outlet through a mesh with a large opening on the inlet side, and the other raw materials pass to the raw material outlet without passing through the mesh. Ahead, it is discharged out of the machine from the coarse powder outlet.

Embodiment An embodiment of the present invention will be described with reference to the accompanying drawings.

The main body casing 1 is provided with a rotating shaft 3 cantilevered in a bearing housing 2. Rotating disks 4 and 5 are provided at a free end and a center portion of the rotating shaft 3, a rotating shaft between the rotating disks 4 and 5, and a rotating disk 5 and a raw material inlet 6.
A plurality of rotary agitating blades 8 and 9 each having a slight inclination angle with respect to the axis are provided on the rotary shaft between the two via an arm. Cylindrical screens 10 and 16 are provided on the outer periphery of the rotary stirring blades 8 and 9 via a flow path of the granular material.
The ends of the cylindrical screens 10, 16 are supported by an inlet-side mounting ring 11 and an outlet-side mounting ring 12, which are fixed to side plates 18, 19.

The cylindrical screens 10, 16 are formed of a net made of synthetic fibers. The mesh of the differential classroom S between the raw material inlet 6 and the rotary disk 5 is formed in a size that allows fine powder to pass through,
Further, the subdivision chamber L between the rotating disk 5 and the rotating disk 4
Is formed in a size that allows fine powder larger than fine powder to pass through. Cylindrical screen 10 facing rotating disk 5
At the connection between the two, a cylindrical screen mounting ring 15 fitted to the rods 13 and 14 is provided, and a side plate 17 is provided outside the ring 15. This side plate 17 is the inlet side plate
18 and the outlet side plate 19, and a fine powder discharge chute 20
And a fine powder discharge chute 21 are formed. Exit side plate 19 and lid
A raw material outlet 23 is provided between the raw material outlet 22 and the outlet 23, and a coarse powder discharge chute 24 communicates with the outlet 23.

 Next, the operation of the present embodiment will be described.

The motor is driven to rotate the rotating shaft 3 and the rotating stirring blades 8 and 9 are rotated.
To rotate. In this state, when the fine-grained raw material M is charged into the raw material supply port 26, the raw material M enters the differential classroom S from the raw material inlet 6, falls into the cylindrical screen 10, and is stirred by the rotary stirring blade 9. Then, the raw material M rotates while being pressed against the inner surface of the cylindrical screen 10.

Therefore, the fine powder a falls through the mesh into the fine powder discharge chute 20, and the other raw materials M flow down along the inner surface of the cylindrical screen 10 and enter the subdivision room L. The raw material M in the fine classification chamber L is rotated along the inner surface of the cylindrical screen 16 while being stirred by the rotary stirring blade 8, and the fine powder b falls to the fine powder discharge chute 21 through the mesh, and the other raw materials are The coarse powder C falls from the raw material outlet 23 to the coarse powder discharge chute 24.

In this way, the raw material of the fine powder is classified into fine powder, fine powder, and coarse powder, but by further increasing the number of mesh openings,
Needless to say, the particles can be classified into more types of particle sizes.

Effect of the Invention Since the multi-selection cylindrical screen classifier according to the present invention is configured as described above, the fine powder in the raw material is classified by a net having a small opening at the raw material inlet side, and the fine powder larger than the fine powder is Classification is performed by a net having a large opening on the outlet side, and the coarse powder is discharged from a raw material outlet. Therefore, unlike the conventional example, multiple sorting can be performed with one cylindrical screen classifier, so that the classifying work efficiency can be improved, the equipment cost can be reduced, and the installation area can be reduced.

[Brief description of the drawings]

 FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention. 3 ... Rotating shaft 6 ... Raw material inlet 8 ... Rotating stirring blade 9 ... Rotating stirring blade 10, 16 ... Cylinder screen 23 ... Raw material outlet

Claims (3)

(57) [Claims] In a cylindrical screen classifier in which a rotary stirring blade is provided on a rotating shaft and a mesh-shaped cylindrical screen is loosely fitted to the rotary stirring blade, the aperture of the cylindrical screen is changed from the inlet side to the outlet side. A multi-selection cylindrical screen characterized in that the cylindrical screen is sequentially enlarged, and the inside of the cylindrical screen is partitioned into a differential classroom with a small opening and a fine classification room with a large opening by a rotating disk fixed to a rotating shaft. Classifier. 2. The multi-selection cylindrical screen classifier according to claim 1, wherein side plates facing each other are provided outside the rotary disk via a cylindrical screen. 3. A cylindrical screen classifier having a plurality of rotary stirring blades attached to a rotary shaft with a slight inclination angle in a raw material discharge direction inside a cylindrical screen tensioned in an axial direction. At the axial intermediate portion and at the outlet end, a rotating disk is mounted on the shaft side at right angles to the rotating disk, a cylindrical screen mounting ring is provided on the corresponding cylindrical screen side, and a side plate is provided on the main body casing side. A small gap or close contact with the outer diameter of the cylindrical screen mounting ring is provided, and a discharge chute or the like connected to this is provided below the outer diameter of the cylindrical screen mounting ring. The plurality of rotary stirring blades inside the cylindrical screen in each of these rooms are also attached to the rotary shaft separately in the axial direction for each of these rooms, The inner diameter of the cylindrical screen inlet side mounting ring is fitted into the outer diameter of the cylindrical portion of the inlet side plate, and the cylindrical screen outlet side mounting ring is integrated with the main body case outlet side case so as to be integrated and axially tensioned with the cylindrical screen. A multi-selection cylindrical screen classifier, wherein each of the cylindrical screen mounting rings is supported, and the screens are sequentially multiplied by increasing the aperture of the screen from the raw material inlet side toward the outlet direction.